Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

An adaptive composite discontinuous Galerkin method for elliptic problems on complicated domains with discontinuous coefficients.

Giani, S. (2020) 'An adaptive composite discontinuous Galerkin method for elliptic problems on complicated domains with discontinuous coefficients.', Advances in computational mathematics., 46 (1). p. 13.

Abstract

In this paper, we introduce the multi-region discontinuous Galerkin composite finite element method (MRDGCFEM) with hp-adaptivity for the discretization of second-order elliptic partial differential equations with discontinuous coefficients. This method allows for the approximation of problems posed on computational domains where the jumps in the diffusion coefficient form a micro-structure. Standard numerical methods could be used for such problems but the computational effort may be extremely high. Small enough elements to represent the underlying pattern in the diffusion coefficient have to be used. In contrast, the dimension of the underlying MRDGCFE space is independent of the complexity of the diffusion coefficient pattern. The key idea is that the jumps in the diffusion coefficient are no longer resolved by the mesh where the problem is solved; instead, the finite element basis (or shape) functions are adapted to the diffusion pattern allowing for much coarser meshes. In this paper, we employ hp-adaptivity on a series of test cases highlighting the practical application of the proposed numerical scheme.

Item Type:Article
Full text:(AM) Accepted Manuscript
Download PDF
(1202Kb)
Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1007/s10444-020-09759-1
Publisher statement:This is a post-peer-review, pre-copyedit version of an article published in Advances in computational mathematics. The final authenticated version is available online at: https://doi.org/10.1007/s10444-020-09759-1
Date accepted:10 January 2020
Date deposited:11 October 2019
Date of first online publication:2020
Date first made open access:21 February 2021

Save or Share this output

Export:
Export
Look up in GoogleScholar